US Bridges

Obrien Road over East Br Munuscong River

FairPosted for load

Chippewa County, Michigan · 1 MI N of Stalwart · Structure no. 000000000001662

Built
2004
21 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
25 ft
1 main span
Daily traffic
5
2005 count
Owner
County
County Highway Agency

About this bridge

Obrien Road over East Br Munuscong River is a steel stringer/multi-beam or girder carrying Obrien Road over East Br Munuscong River in Chippewa County, Michigan. It was built in 2004, so it is 21 years old, younger than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 5 vehicles a day, projected to reach 5 by 2019. The structure is 25 ft (7.5 m) long and 20 ft wide. If it were closed, the detour would be 124.3 mi (200 km).

Location

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CarriesObrien Road
CrossesEast Br Munuscong River
Location1 MI N of Stalwart
RouteCounty Highway 0
CountyChippewa County
StateMichigan
Coordinates46.10822, -84.23875
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating24.7 US tons
Inventory rating14.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckOpen grating
Main spans1
Design loadUnknown
Structure length25 ft (7.5 m)
Longest span20 ft (6 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2005)
Projected traffic5 by 2019
Trucks0%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed124.3 mi (200 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Obrien Road over East Br Munuscong River built?

It was built in 2004, making it 21 years old in 2025.

What condition is Obrien Road over East Br Munuscong River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2023.

How much traffic does Obrien Road over East Br Munuscong River carry?

About 5 vehicles per day (2005 count).

How long is Obrien Road over East Br Munuscong River?

The structure is 25 ft (7.5 m) long with a longest span of 20 ft (6 m) and a deck 20 ft wide.

Who owns Obrien Road over East Br Munuscong River?

It is owned by the County Highway Agency.